Great Pyramid Passages and Chambers, Volume 1 (1910 edition). By John and Morton Edgar. The Edgars were associates of Charles Taze Russell and wrote this treatise in defense of Russell's views on the prophetic symbolism of the Great Pyramid of Gizeh in Egypt. This volume was advertised in the August 1, 1910 Watch Tower and was sold by the Brooklyn and London branches of the Watchtower Society. It was later revised in 1923. This was circulated among Bible Students (Jehovah's Witnesses) until 1928. Bible Students who retained Russell's teachings still circulate the volume.